Stock Based Compensation Plans (Assumptions Used In Valuation Of Stock Options) (Details)	3 Months Ended	6 Months Ended
Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Stock Based Compensation Plans
Risk-free interest rate	2.00%	2.70%	2.10%	2.70%
Expected life in Years	6.2	6.5	6.2	6.5
Expected volatility	21.00%	21.40%	21.00%	21.40%
Dividend Yield	1.70%	0.80%	1.70%	0.80%

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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